Wrench.



J. R. COYLE.

WRENCH. 1 APPLICATION FILED APR.18,'191 1.-

1,02 9;171, Patented June 11,1912.

mbe/wtoz COLUMBIA PLANOORAPH 60-, WASHINGTON. n. c.

srATEs PATENT oroE.

JAMES R. COYLE, OF HUNTSVILLE, ALABAMA.

WRENCH.

To all whom it may concern:

Be it known that I, JAMES R. COYLE, citizen of the United States, residing at Huntsville, in the county of Madison and State of Alabama, have invented certain new and useful Improvements in Wrenches, of which the following is a specification.

This invention has for its object a simple, durable and efficient construction of wrench, the parts of which are so arranged that in the use of the wrench, the harder the handle is pressed on, the more tightly will the jaws grip the nut, thereby preventing the jaws from turning or slipping on the work which would tend to cause the jaws to become rough and injure the nut.

With this and other objects in view, as will more fully appear as the description proceeds, the invention consists of certain constructions, arrangements and combinations of the parts that I shall hereinafter fully describe and claim. For a full under standing of the invention, reference is to be had to the following description and accompanying drawing, in which:

Figures 1 and 2 are side elevations of a wrench constructed in accordance with my invention, parts being shown partly in section; and, Fig. 3 is a transverse sectional view, the section being taken on the line 33 of Fig. 1.

Corresponding and like parts are referred to in the following description and indicated in all the views of' the drawing by the same reference characters.

Referring to the drawing, the numeral 1 designates the relatively stationary jaw of my improved wrench, the same being formed as an integral part of the main shank or bar 2. The shank 2 is mounted in a socket 3 formed in the handle 4, and is pivotally connected to the handle by a transverse pivot or bolt 5 which extends through the shank near the rear end of the latter and through the side walls of the socket 3. The rear edge of the shank 2 is beveled within the socket 3 beyond the pivot 5, as indicated at 6, whereby to permit the shank and handle to have a limited rocking movement relative to each other.

7 designates the relatively movable jaw of my improved wrench. This jaw is provided with yokes 8 by which it is mounted for a longitudinally sliding movement on the shank 2, said jaw being formed with a threaded bore in which the actuating rod or Specification of Letters Patent.

Application filed April 18, 1911.

Patented June 11, 1912.

Serial No. 621,827.

shaft 9 works, said rod being provided with a preferably milled nut 10 by which it may be easily rotated. The rear end of the actuating rod 9 is formed with a ball-shaped head 11 designed to fit in a recess 12 formed in the handle 4:, the bottom walls of said recess being preferably angular or V-shaped as shown so as to minimize the friction on the head 11 as the latter turns and rocks. The head is prevented from withdrawal from the recess 12 by means of transversely extending pins 13 and 14 inserted through the side walls of the recess 12, as clearly illustrated in the drawing.

From the foregoing description in connection with the accompanying drawing, the operation of my improved wrench will be apparent.

In the practical use of the device, the movable jaw 7 is adjusted against one side of the nut or the like by rotating the actuating rod 9, and the handle 4 is then grasped so as to exert pressure on the wrench'in a direction to screw the nut on or 05. Ohviously, as the handle is pressed in a direction to rock the same so that the handle will assume an angular relation with the shank or bar 2, the pressure of the recessed lateral projection 15 of the handle will be exerted on the head 11 of the actuating rod 9 in a direction to cause said rod to press the movable jaw 7 tightly against the work, the tendency being to slide the movable jaw toward the stationary jaw 1, consequently the harder the handle is pressed upon, the more tightly will the jaws engage the opposite sides of the nut, and hence all slipping will be prevented and all liability to injure the sides of the nut or the work-engaging faces of the jaws will be precluded.

It will thus be seen that I have provided a very efficient and durable construction of wrench, the parts of which may be cheaply made and easily assembled, and which will be very eifective in operation as just before specifically pointed out.

What I claim is:

A wrench of the character described, comprising a handle formed with a socket and with a lateral projection to one side of said socket, said projection having a recess formed therein, a shank provided with a stationary jaw and pivotally mounted in the socket at a point in advance of the recess, an actuating rod formed with a head mounted to turn and rock in said recess, and a movadjoining wall of the socket with the handle in angular relation to the shank so as to relieve the pivot of the shank from undue strain.

In testimony whereof, I affix my signature in presence of two witnesses.

JAMES R. COYLE.

Witnesses:

' CLARA J. MCDOWELL,

E. J. MITCHELL.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, I). 0. 

